INDEX. Sp-Un 



545 



Springs, relation of volcanoes to, 191. 

 Spurs from mountain-chains, 354. 

 Staffa, 318. 



Staffordshire coal-fields, iron of, 431. 

 Start Point, schists of, 381. 

 Statuary limestone with garnets, 390. 

 Steam, its relation to upheaval, 327. ^ 



in volcanic eruptions, 182. 



Steno, 3. 

 Stenzelberg, 259. 

 Stilbite, 28. 



Stiperstones, sand of, 95. 

 Stirling, volcanoes of, 308. 

 Stockworks, 404. 

 Stonesfield Slate, 47. 

 Strabo, 2. 

 Strata, contorted, 76. 



defined by Playfair, 71. 



disturbed, 75. 



interposed, 71. 



originally level, 75. 



table of, 55. 



vertical, 76. 



Stratification, 61. 



valleys of, 139. 



Striated boulders, 150. 



Strike, 65. 



Strings, 403. 



Strokr, 194. 



Strombodes, figure of, 481. 



Stromboli, 178. 



Strombus, distribution of, 456. 



Strontian, 29. 



granite, 239. 



Structural metamorphism, 357. 

 Study of volcanic rocks, 252. 

 Sub-serial denudation, rate of, 143, 166. 

 Succession of continents, 355. 



of life in time, 445. 

 of plant-life in time, 473. 

 Successive deposition in veins, 401. 

 Sulphur caves of Corinth, 192. 



on Aran Mowddwy, 103. 



Summary, 526. 



Superposition of faunas, Edw. Forbes 

 on, 455. 



of strata, 63. 



Surface of a volcano, 186. 

 Swab, 3. 

 Syenite, 38. 



of Ailsa Craig, 251. 



Syenitic granite, 36, 216. 

 Symes on Mayo granite, 248. 

 Synclinal dip, 64. 

 valleys, 141. 



TABLELANDS, 131. 



valleys in, 140. 



Tachylyte, 280. 



Taconian series, 396. 



Talc, 25. 



Talcose slates in Scotland, 388. 



Tardree, rhyolite of, 315. 



Taxocrinus, figure of, 486. 



Teall on the Cheviots, 298. 



on dykes, 339. 



Teesdale, basalt of, 336. 

 VOL. I. 



Teesdale, metamorphism in, 360. 



Teleosauria, 513. 



Temperature of earth's surface, 14. 



of lava, 185. 



Temple's comet, 18. 

 Terebratula, figures of, 496. 

 Terminal moraines, 150. 

 Tertiary birds, 520. 



foraminifera. 480. 



iron ores, 434. 



sponges, 478. 



strata, physical breaks in, 343. 



volcanic rocks, 314. 



Tetrabranchiata, 500. 

 Tetracoralla, 481. 

 Texture of gneiss, 371. 



of igneous rocks, 253. 



Thickness of basalt streams, 282. 

 Thomson, Sir W., 11. 



on deep-sea life, 443, 455. 



on echinoderms, 489. 



Thomsonite, 28. 



Tin, 419. 



Tiree, crystalline limestone of, 378. 



Tiverton, volcano of, 314. 



Tobermory, 41. 



Topley on inclined deposition, 331. 



Tor Cross, slates of, 381. 



Tornidneon, granite veins of, 248 



Torpedoes, fossil, 503. 



Torre del Greco overwhelmed, 185. 



Torridon sandstone, 386. 



Torynocrinus, figure of, 487. 



Tourmaline, 27. 



granite, 217. 



Trachyte, 264. 



porphyry, 37. 



Transatlantic province, 459. 

 Transition from gneiss to granite, 



371. 



Transporting power of streams, 156. 

 Traquair on fossil fishes, 506. 

 Trees in volcanic ash, 304. 

 Triassic crinoids, 486. 



foraminifera, 479. 



sands, 96. 



Trigonia, figure of, 498. 

 Trilobites, British, 492. 

 Trinidad pitch lake, 193. 

 Trinucleus, figure of, 492. 

 Tropical zone, flora of, 471. 



mollusca of, 460. 



Trossachs, slate rocks of, 384. 



Tryon, G. W., on mollusca, 498. 



Tylas, 3. 



Tyndall, Dr. J., on cleavage, 32. 



Tynemouth dyke, Teall on, 339. 



Types of basalt in North America, 



281. 



UDDEVALLA, 326. 

 Unconformity, 78. 



inferred from fossils, 341. 



Uncrystalline texture, 254. 

 United States, granite of, 220. 

 Unkel, 27. 

 Unstratified rocks, 69. 



2 M 



